Canadians who had allergic reaction to first vaccine dose can safely get second, advisory committee says
CBC
Those who had an allergic reaction to their first shot of an mRNA COVID-19 vaccine can safely receive future doses of the same product or a different mRNA vaccine, says Canada's vaccine advisory committee.
While rare, there have been reported cases of individuals experiencing severe and immediate allergic reactions to a first dose, said the National Advisory Committee on Immunization (NACI).
After reviewing evidence from recent studies, NACI said it found that most people who experienced an immediate allergic reaction did not have a similar reaction when receiving a second dose.
Previously, NACI had been recommending against "routinely" offering second doses to those who had severe allergic reactions after their first shot, saying that second shots should be offered in such cases only when a risk assessment concludes that the benefit of vaccination outweighs the allergy risk.
"That's good news in so many ways," Canada's Chief Public Health Officer Dr. Theresa Tam said of NACI's new advice today.
"Now there's an opportunity for some of these individuals to get their full protection."
The Canadian Society of Allergy and Clinical Immunology says allergic reactions to vaccination, including severe ones, are extremely rare. Studies suggest the estimated annual rate of such severe reactions in Canada is about 0.4 to 1.8 cases per one million doses of vaccine administered.
According to Health Canada's review of adverse vaccine reactions, 307 cases of anaphylaxis have been reported in the country — out of more than 56 million COVID-19 doses administered.
But Friday's updated guidance comes with some recommended precautions.
The advisory committee says those who have had an allergic reaction after their first dose should consult an allergist or doctor before going to get their second shot. The committee says they should also be observed for a half-hour after getting the second dose, rather than the routine 15 minutes.
Tam said the shot should also be administered under "careful watch" by a doctor.
"Just by taking a bit more care, this population can be safely vaccinated," Tam said.
Some doctors and allergists have noted an uptick in Canadians seeking medical exemptions to vaccination requirements due to allergy fears.
Tam said such an exemption could be granted but would depend on an individual assessment by a doctor or allergist.
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